At 6am EDT this morning, Blaze did have some issues. Most of our servers lost their players at that time.
All versions of BF3 have crashing problems, and all RSPs are seeing them quite frequently. (I've mentioned this in a few threads, but it's worth repeating.) I send crash logs and dumps to DICE and have sent quite a few with each server release. If you feel that you have a new and unique type of crash, have me retrieve the files and I will send them to DICE.
So a back end issue is what causes all my servers to dump their players at the same time?